Pulsars & Black Holes

When large mass concentrates into
very small volume it makes a black hole.

Pulsars are rotating neutron stars.
Most neutron stars discovered today are in the form of radio pulsars. They are called radio pulsars because they emit radio waves. We can simply connect a radio telescope to a loud speaker and hear a pulsar. Pulsars sound like someone persistently knocking. Click here and listen to a
slow knocking pulsar. Click here and listen to a
fast knocking pulsar.
So in short, we can hear a pulsar knock.

The Quran describes a star by "The one who
knocks":

[Quran 86.1-3] And the heaven and the "Knocker" (Tarek in Arabic
طارق) How could you know about the "Knocker"? The piercing star (Thakeb in Arabic).

The Arabic word "Thukb ثقب" means a hole; "Thakeb
ثَّاقِبُ" means the one who makes the hole. The Quran is describing a knocking star that makes a hole.

Pulsars are rotating neutron stars.
As more matter falls into a neutron star its mass increases and
as
its mass increases its gravity increases. But gravity is
actually curvature of spacetime. A neutron star distorts
spacetime. As more matter falls into a neutron star its distortion
increases. A point will
be reached where distortion would have grown so much that it
makes a hole in spacetime.

How could an illiterate man who lived
1400 years ago have known that pulsars make holes in spacetime?

(Our sun is a very small star. Actually our solar system (including the atoms that
you are made of) came from a dying star 100 times more massive than our sun. Some stars are even bigger than our solar system, so you
can imagine how large stars are. However according to the Bible these stars are so
small that they could fall on Earth: In
Mark 13:24-30
Jesus said that
stars will fall on Earth before his second coming. Actually he said that stars
will fall on Earth before even that generation passes away. However
that generation passed away a
long time ago and no star ever fell on Earth nor ever will. Do you know why? Because Earth
will vaporize before it even contacts a star. So the events prophesied in the
Bible are supposed to occur on Earth when Earth is already vaporized!)

To Christians

[Quran 42.14-15]
They only disbanded after they received knowledge (of their Bible) fallaciously among them. And if it were not a word from your Lord [Allah] that postponed it to a later date, it would have been all settled among them then. And those who inherited the Book (the Bible) from them are in great suspicion of it. Therefore call them (to the Quran) and straighten your ways as you are ordered and don't follow their passions and say: "I believe in what Allah revealed of the Book (The Quran) and I was ordered to be just among you (both Christians and Jews); Allah is our Lord and your Lord, we have our actions and you have your actions, no argument between us and you, Allah brings us together and to Him we are (all) destined."

To Muslims

[Quran 6.108]
Do not curse those who call (to worship) other than Allah, so that they don't curse Allah out of spite and ignorance. This is how We [Allah] appealed to each people its own actions; then they will be brought back to their Lord [Allah] who will inform them of what they have been doing.